Cotzin, M. and Gallagher, J. J. "Validity of Short Forms of the Other Wechsler Bellevue Scale for Mentally Defectives." Journal of Consulting Psychology , XIII (1949), 357-365.
2.
Finley, Carmen J. and Thompson, J. "An Abbreviated Wechsler Intelligence Scale for Children for Use With Educable Mentally Retarded." American Journal of Mental Deficiency, LXIII (1958 ),473-480.
3.
State of California. Education Code.Sacramento: California State Documents Section, Printing Division, 1955.
4.
Wechsler, D.Manual for Wechsler Intelligence Scale for Children. New York: Psychological Corporation, 1949.